18 Sound 6ND430

6.5" · 8 Ω · 200 W · 92.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	6.5"
Impedance	8 Ω
Fs	61 Hz
Qts	0.27
Qes	0.28
Qms	6.5
Vas	12.6 L
Sd	133 cm²
Xmax	5 mm
Re	5.5 Ω
Bl	10 T·m
Mms	13.3 g
Pe	200 W
Sensitivity	92.5 dB

Alignment hint

EBP	218 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 2.2 L

EBP > 100: favours a ported (bass-reflex) alignment.

Rules of thumb from T/S parameters only. Verify against a real simulation before cutting wood.

Substitute candidates

Driver	Fs (Hz)	Qts	Vas (L)	Xmax (mm)	Sens (dB)	Fit	Notes	Compare
18 Sound 6ND430	64 +3	0.24 -0.03	12.2 -0.4	5 =	92.5 =	close	4 Ω vs 8 Ω: amp load changes	+
Beyma 6P200Fe	58 -3	0.26 -0.01	11.1 -1.5	5 =	93 +0.5	close		+
Beyma 6"P200/ND	56 -5	0.29 +0.02	11.9 -0.7	5.5 +0.5	92 -0.5	close		+
18 Sound 6ND430	66 +5	0.3 +0.03	12.6 =	5 =	94 +1.5	close	16 Ω vs 8 Ω: amp load changes	+
Oberton 6NB150	62.32 +1.32	0.28 +0.01	9.3 -3.3	5.5 +0.5	92 -0.5	close	150 W vs 200 W: lower power handling	+
Oberton 6B150	55.04 -5.96	0.292 +0.02	14.61 +2.01	5.5 +0.5	92 -0.5	close	150 W vs 200 W: lower power handling	+
B&C 6PS38	75 +14	0.3 +0.03	8 -4.6	6 +1	94 +1.5	usable	150 W vs 200 W: lower power handling	+
Beyma 6P200Fe	66 +5	0.35 +0.08	8.8 -3.8	4 -1	93 +0.5	usable	16 Ω vs 8 Ω: amp load changes · Xmax 4 mm < 5 mm: lower excursion-limited SPL	+
B&C 6PS44	71 +10	0.33 +0.06	7 -5.6	4.5 -0.5	93 +0.5	usable	Xmax 4.5 mm < 5 mm: lower excursion-limited SPL	+
B&C 6NDL38	69 +8	0.39 +0.12	7.1 -5.5	6 +1	91 -1.5	risky	4 Ω vs 8 Ω: amp load changes · 150 W vs 200 W: lower power handling	+

Compare the closest 3 against the 6ND430 →

Ranked on parameter similarity only (Qts, Fs, Vas, Xmax, sensitivity). Same nominal size required. A hint, not a simulation, model the swap before cutting or buying.

Used in enclosures (0)

No enclosure in the catalog uses this driver yet.